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https://issues.apache.org/jira/browse/CASSANDRA-10837?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15060238#comment-15060238
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Alex Liu commented on CASSANDRA-10837:
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+1, The patch can't be applied to my testing environment for it's used in a
slightly different branch. The patches looks good to me, some simple testing
should be enough to verify it.
> Cluster/session should be closed in Cassandra Hadoop Input/Output classes
> -------------------------------------------------------------------------
>
> Key: CASSANDRA-10837
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10837
> Project: Cassandra
> Issue Type: Bug
> Components: CQL
> Reporter: Alex Liu
> Assignee: Alex Liu
> Fix For: 3.0.x
>
> Attachments: 10837-3.0-branch.txt, 10837-3.0-v4.txt,
> 10837-v2-3.0-branch.txt, 10837-v3-3.0-branch.txt
>
>
> See a lot of following warnings during Hadoop job running
> {code}
> ERROR 11:37:45 LEAK: You are creating too many HashedWheelTimer instances.
> HashedWheelTimer is a shared resource that must be reused across the JVM,so
> that only a few instances are created.
> {code}
> Each cluster/session needs be closed and a shared HashedWheelTimer may reduce
> the resource leakage.
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